EP 0049748 B1 19840321 - IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE
Title (en)
IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE
Publication
Application
Priority
DE 3038285 A 19801010
Abstract (en)
[origin: ES8207207A1] Iron blue pigment (DIN 55 906) is produced by white paste precipitation and subsequent oxidation of the white paste. Alkali or alkali metal ions i.e. sodium and potassium ions, cyanide or complex iron cyanide ions and iron ions are used as raw materials. The iron blue pigment according to the invention is characterized by a potassium content of 7.0-9.0% by weight, preferably 7.6-9.0% by weight, a sodium content of 0.5-2.0% by weight, preferably 0.5-1.5% by weight, a coloring power according to DIN 53 204 and DIN 53 234 of 5-15% above the Vossen Blue 705 Standard and the following color intervals (determined in accordance with DIN 53 204 and DIN 53 234 in conjunction with DIN 6174, in relation to Vossen Blue 705 as standard): DELTA L: -0.7 to -1.5 DELTA a: -0.5 to +0.3 DELTA b: -0.6 to -2.3 DELTA C: +0.5 to +2.0 In order to save potassium ions, the white paste precipitation of the iron blue pigment according to the invention is carried out in two phases, potassium ions being used as alkali ions in the first phase and sodium ions in the second phase. After removal of the reaction salts and addition of potassium salts, the white paste suspension thus obtained is aged and subsequently oxidized to iron blue pigment by known methods. The iron blue pigment can be used as a pigment for the production of printing inks, colored paints, colored varnishes and as coloring agents for fungicides.
IPC 1-7
IPC 8 full level
C09D 11/00 (2006.01); C01C 3/12 (2006.01); C01G 49/00 (2006.01); C09C 1/00 (2006.01); C09C 1/22 (2006.01); C09C 1/26 (2006.01); C09D 11/02 (2006.01)
CPC (source: EP US)
C09C 1/26 (2013.01 - EP US); C01P 2006/60 (2013.01 - US); C01P 2006/80 (2013.01 - US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0049748 A1 19820421; EP 0049748 B1 19840321; BR 8106545 A 19820629; CA 1165511 A 19840417; DE 3038285 A1 19820506; DE 3162809 D1 19840426; ES 505649 A0 19820901; ES 8207207 A1 19820901; JP S57102958 A 19820626; JP S618014 B2 19860311; US 4368075 A 19830111
DOCDB simple family (application)
EP 81106246 A 19810811; BR 8106545 A 19811009; CA 387675 A 19811009; DE 3038285 A 19801010; DE 3162809 T 19810811; ES 505649 A 19810921; JP 15954581 A 19811008; US 30952381 A 19811006